Stress anxiety

After practically no time in school - and no 'actual' lessons today, i came home feeling extremly tired. On the way home from school i was feeling really irritated... at everyone. Haha. I was getting annoyed/irritated at all these small things - people walking to slowly, people looking at me, no seat on the tram etc. (Silly things which never bother me... well, slow walking people do!!) By the time i got home my energy was at zero. So i ate a snack.... a HUGE one. i.e 2 bowls of yoghurt with nuts,seeds coconut flakes. I still feel sick 3 hours later. :/
 
But when i sat down to start working, i almost wanted to burst into tears. Its roughly 3 more school weeks left, and my list of assignements and tests isnt decreasing, its just getting larger. More and more assignments are being added to the list. And they're not small assignements. They're 4-5 page essays i need to write. And i just dont have the motivation. I want to creep into bed and never wake up.
  I almost felt my self starting to panic and hyperventilate. I just sat staring at the list. I felt this angry bubble form inside of me, and i wanted to scream. Smash plates.... go to the gym and just lift some heavy ass weights. Though i couldnt do either..... :/ So i resorted to writing in my diary. Which helped a litte. I also just lay in my bed, cuddling my dog for a half hour or so. Letting the anxiety pass.... letting myself cool down.
   
Now, im feeling a little better. Though i still feel really anxious and stressed and tired. And just feeling like going to sleeep and never waking up.
  I knew this would happen sooner or later. I cant deal with stress. When im stressed i lose my apetite, i feel depressed and at times can resort to self harm to cope - yes, over the past  year (since ive recovered) i have self harmed to try to cope with my stress.
   I hate stress, and sometimes i feel like just dropping out of school to avoid stress. I am old enough that legally i am allowed to drop out of school. Thogh im not so sure what i would do with my life then, and i wouldnt get 'study grants' or whatever its called.
  So its not exactly a good situation to put myself into. And the fact that i do want to continue studying and get a carrier when im older.
 
Going through a tough time write now... :/ And of course, today was my sisters last day of school - she's graduating this summer. And she did her last test today!! (Congratulations to her!! She is great!! She goes the IB program , so its a tough course!) But i can say, im very jealous that she has now finished school. Though i guess she has the pressures of choosing whether to continue and study to college or to work...

Usch. When will life get easier? :/